Geologi

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Geologi

Innlegg QIQrrr 19 Mai 2011, 03:57

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Technology Review, May 18, 2011: Geologists have long puzzled over anecdotal reports of strange atmospheric phenomena in the days before big earthquakes. But good data to back up these stories has been hard to come by. In recent years, however, various teams have set up atmospheric monitoring stations in earthquake zones and a number of satellites are capable of sending back data about the state of the upper atmosphere and the ionosphere during an earthquake. Last year, we looked at some fascinating data from the DEMETER spacecraft showing a significant increase in ultra-low frequency radio signals before the magnitude 7 Haiti earthquake in January 2010. Today, Dimitar Ouzounov at the NASA Goddard Space Flight Centre in Maryland and a few buddies present the data from the Great Tohoku earthquake which devastated Japan on 11 March. Their results, although preliminary, are eye-opening. They say that before the M9 earthquake, the total electron content of the ionosphere increased dramatically over the epicentre, reaching a maximum three days before the quake struck. At the same time, satellite observations showed a big increase in infrared emissions from above the epicentre, which peaked in the hours before the quake. In other words, the atmosphere was heating up - Atmosphere Above Japan Heated Rapidly Before M9 Earthquake

Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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QIQrrr
 
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Re: Geologi

Innlegg simon 19 Mai 2011, 09:06

Minner om fenomenene som observeres i Hessdalen: http://www.hessdalen.org/index_n.shtml

Nokså logisk, når man tanker på de spenningene som bygges opp i berglagene under slike forhold.
simon
 
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Re: Geologi

Innlegg Onarki 19 Mai 2011, 09:25

simon skrev:Minner om fenomenene som observeres i Hessdalen: http://www.hessdalen.org/index_n.shtml

Nokså logisk, når man tanker på de spenningene som bygges opp i berglagene under slike forhold.


Jepp, legg nå inn den kompliserende faktoren at berglagene blir påvirket av ytre elektromagnetiske krefter slik som kosmisk stråling og utbrudd på solen, og da sitter du igjen med en interessant mulighet: det er ikke sikkert at det er berglagene som forårsaker jordskjelvet. Det er meget mulig at jordskjelvet påvirkes/utløses av solstormer og geomagnetisk turbulens.


http://globalrumblings.blogspot.com/201 ... ed-by.html
Onarki
 
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Re: Geologi

Innlegg simon 19 Mai 2011, 10:01

Jorden er på mange måter en spole med jernkjerne, ja.
simon
 
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Re: Geologi

Innlegg QIQrrr 19 Mai 2011, 18:01

Onarki skrev:Det er meget mulig at jordskjelvet påvirkes/utløses av solstormer og geomagnetisk turbulens.

Apropos:

    SAO/NASA ADS Physics Abstract Service, May 2007: We present the study of 682 earthquakes of 4.0 magnitude observed during January 1991 to January 2007 in the light of solar flares observed by GOES and SOXS missions in order to explore the possibility of any association between solar flares and earthquakes. Our investigation preliminarily shows that each earthquake under study was preceded by a solar flare of GOES importance B to X class by 10-100 hrs. However, each flare was not found followed by earthquake of magnitude 4.0. We classified the earthquake events with respect to their magnitude and further attempted to look for their correlation with GOES importance class and delay time. We found that with the increasing importance of flares the delay in the onset of earthquake reduces. The critical X-ray intensity of the flare to be associated with earthquake is found to be ~10-6 Watts/m2. On the other hand no clear evidence could be established that higher importance flares precede high magnitude earthquakes. Our detailed study of 50 earthquakes associated with solar flares observed by SOXS mission and other wavebands revealed many interesting results such as the location of the flare on the Sun and the delay time in the earthquake and its magnitude. We propose a model explaining the charged particles accelerated during the solar flare and released in the space that undergone further acceleration by interplanetary shocks and produce the ring current in the earth's magnetosphere, which may enhance the process of tectonics plates motion abruptly at fault zones. It is further proposed that such sudden enhancement in the process of tectonic motion of plates in fault zones may increase abruptly the heat gradients on spatial (dT/dx) and temporal (dT/dt) scales responsible for earthquakes - Whether solar flares can trigger earthquakes?
Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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QIQrrr
 
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Re: Geologi

Innlegg QIQrrr 02 Jul 2011, 08:56

Mail Online, July 1, 2011: This week, parts of the Cornish coastline were hit by what appears to have been a mini-tsunami. The wave was of no great height, but it was still substantial enough to suck the sea out for 150 feet or more, before surging back in to drench the causeway linking St Michael’s Mount to the mainland near Penzance, and giving tourists a soaking. The wave rolled up the estuaries and rivers from Mounts Bay in the West to Plymouth in the east, sending small boats rolling on their keels. If that isn’t strange enough, witnesses said it was preceded by a surge of static electricity. ‘People’s hair stood on end,’ said a National Trust guide on the Mount - The hair-raising truth about the Cornish tsunami triggered by under-sea earthquake
Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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Re: Geologi

Innlegg QIQrrr 04 Jul 2011, 05:36

Reuters, July 4, 2011: Vast deposits of rare earth minerals, crucial in making high-tech electronics products, have been found on the floor of the Pacific Ocean and can be readily extracted, Japanese scientists said on Monday. "The deposits have a heavy concentration of rare earths. Just one square kilometre (0.4 square mile) of deposits will be able to provide one-fifth of the current global annual consumption," said Yasuhiro Kato, an associate professor of earth science at the University of Tokyo. [...] The deposits are in international waters in an area stretching east and west of Hawaii, as well as east of Tahiti in French Polynesia, he said. He estimated rare earths contained in the deposits amounted to 80 to 100 billion tonnes, compared to global reserves currently confirmed by the U.S. Geological Survey of just 110 million tonnes that have been found mainly in China, Russia and other former Soviet countries, and the United States. Details of the discovery were published on Monday in the online version of British journal Nature Geoscience - Huge rare earth deposits found in Pacific
Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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QIQrrr
 
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Re: Geologi

Innlegg QIQrrr 18 Jul 2011, 22:26

British Antarctic Survey, July 11, 2011: Scientists from British Antarctic Survey (BAS) have discovered previously unknown volcanoes in the ocean waters around the remote South Sandwich Islands. Using ship-borne sea-floor mapping technology during research cruises onboard the RRS James Clark Ross, the scientists found 12 volcanoes beneath the sea surface — some up to 3km high. They found 5km diameter craters left by collapsing volcanoes and 7 active volcanoes visible above the sea as a chain of islands - Underwater Antarctic volcanoes discovered in the Southern Ocean

Bilde
Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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Re: Geologi

Innlegg QIQrrr 15 Aug 2011, 02:49

The New York Times, August 13, 2011: A Silicon Valley company is assembling a sprawling network of electrical contraptions across California that its investors hope will prove many seismologists wrong and become a valuable public-safety tool that reliably predicts earthquakes. The project, called QuakeFinder, involves installing some 200 five-foot-tall sensors near fault lines to measure changes in underground magnetic fields and detect electrically charged particles in the air. The theory behind it is that changes in electromagnetic fields can foretell quakes. The science behind QuakeFinder, however, is disputed. Most seismologists dismiss it as bogus and have long concluded that forecasting earthquakes is impossible - Pursuing the Grail of an Earthquake Predictor, but Facing Skeptics
Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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Re: Geologi

Innlegg QIQrrr 08 Sep 2011, 12:10

University of Bristol, September 7, 2011: Ultra high precision analyses of some of the oldest rock samples on Earth by researchers at the University of Bristol provides clear evidence that the planet’s accessible reserves of precious metals are the result of a bombardment of meteorites more than 200 million years after the Earth was formed. The research is published today in Nature - Where does all the gold come from?
Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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Re: Geologi

Innlegg QIQrrr 04 Okt 2011, 07:57

Via WUWT:

    Geophysical Research Letters, September 15, 2011: The 2011 March 11 Tohoku-Oki earthquake (Mw9.0) caused vast damages to the country. Large events beneath dense observation networks could bring breakthroughs to seismology and geodynamics, and here I report one such finding. The Japanese dense network of Global Positioning System (GPS) detected clear precursory positive anomaly of ionospheric total electron content (TEC) around the focal region. It started ~40 minutes before the earthquake and reached nearly ten percent of the background TEC. It lasted until atmospheric waves arrived at the ionosphere. Similar preseismic TEC anomalies, with amplitudes dependent on magnitudes, were seen in the 2010 Chile earthquake (Mw8.8 ), and possibly in the 2004 Sumatra-Andaman (Mw9.2) and the 1994 Hokkaido-Toho-Oki (Mw8.3) earthquakes, but not in smaller earthquakes - Ionospheric electron enhancement preceding the 2011 Tohoku-Oki earthquake
Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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QIQrrr
 
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Re: Geologi

Innlegg QIQrrr 20 Des 2011, 05:05

Carnegie Institution for Science, December 19, 2011: The crushing pressures and intense temperatures in Earth’s deep interior squeeze atoms and electrons so closely together that they interact very differently. With depth materials change. New experiments and supercomputer computations discovered that iron oxide undergoes a new kind of transition under deep Earth conditions. Iron oxide, FeO, is a component of the second most abundant mineral at Earth’s lower mantle, ferropericlase. The finding, published in an upcoming issue of Physical Review Letters, could alter our understanding of deep Earth dynamics and the behavior of the protective magnetic field, which shields our planet from harmful cosmic rays - A New Kind of Metal in the Deep Earth
Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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QIQrrr
 
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